Acetic acid (4aR,5R,6S,8S,8aS)-6-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-8-methanesulfonyloxy-2,2,5-trimethyl-hexahydro-benzo[1,3]dioxin-8a-ylmethyl ester

(S)-3-Benzyloxy-3-((4S,5R)-4-benzyloxymethyl-5-isopropenyl-2,2-dimethyl-[1,3]dioxan-4-yl)-propan-1-ol